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TobaccoSeeds

ABSTRACT: Microbiome analyses of seeds of different tobacco cultivars

PROVIDER: PRJEB31125 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR3224030.fastq.gz	Fastqsanger.gz
	ERR3224040.fastq.gz	Fastqsanger.gz
	ERR3224031.fastq.gz	Fastqsanger.gz
	ERR3224041.fastq.gz	Fastqsanger.gz
	ERR3224032.fastq.gz	Fastqsanger.gz

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Project description:tobacco seeds

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Small RNA profiling in two Brassica napus cultivars identifies microRNAs with oil production and developmental correlated expressions and new small RNA classes

Project description:MicroRNAs and siRNAs are important regulators of plant development and seed formation, yet their population and abundance in the oil crop Brassica napus are still less understood, especially at different developmental stages and among cultivars with varied seed oil contents. Here, we systematically analyzed the small RNA expression profiles of Brassica napus seeds at early embryonic developmental stages in a high oil content and a low oil content Brassica napus cultivars, both cultured in two environments. A total of 50 conserved miRNAs and 11 new miRNAs were identified, together with some new miRNA targets. Expression analysis revealed some miRNAs with varied expression levels in different seed oil content cultivars or at different embryonic developmental stages. A large amount of 23-nt small RNAs with specific nucleotide composition preference were also identified, which may present new classes of functional small RNAs.

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Proteome profiling highlights mechanisms underlying pigment and tocopherol accumulation in red and black rice seeds

Project description:Rice is a major component of the human diet and feeds more than 50 million people across the globe. Therefore, efforts are being made to improve the nutritional quality of rice seeds in order to make a super-rice cultivar rich in antioxidants and vitamins. We previously developed two rice cultivars, Super-hongmi (red seeds) and Super-jami (black seeds), that were highly rich in antioxidants and exhibited high levels of radical scavenging activities. However, the molecular mechanism underlying the color development and accumulation of different antioxidants in these rice cultivars remains largely elusive. Here, we report the proteome profiles of mature Super-hongmi, and Super-jami seeds and compared with the Hopum (white seeds) using a label-free quantitative proteomics approach. This approach led to the identification of 5127 rice seed proteins of which 1628 showed significant changes (ANOVA, Benjamini-Hochberg FDR ≤ 0.01, fold change ≥ 1.5). Functional annotation of the differentially modulated proteins led to the identification of a phytoene desaturase (PDS3) that was highly enriched in the red seeds and was decreased in the black seeds as compared to the control white seeds. PDS3 is involved in the conversion of phytoene to ζ-carotene which may be responsible for the accumulation of red color in red seeds. Moreover, black seeds seem to accumulate higher levels of anthocyanins because of the higher abundance of dihydroflavonol 4-reductase. In addition, proteins associated with lignin and tocopherol biosynthesis were found to be highly increased in both red and black cultivars. Taken together, these data report the seed proteome of three different colored rice seeds and identify novel components associated with pigment accumulation.

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Comparative transcriptomic analyses of high and low oleic acid content sunflower (Helianthus annuus L.) seed development

Project description:RNA sequencing in sunflower for detect mRNA expression of developmental seeds. The two cultivars (86-1, L-1-OL-1) with significant difference in oleic acid content in two different seed developmental stages (oleic acid accumulated rapidly at 17 DAF, and kept relatively stable at 27 DAF) for transcriptome sequencing

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Project description:Purpose: we conducted a six time-point transcriptomic analysis using two tobacco cultivars with contrasting cold responses, Taiyan8 tobacco (TT, cold susceptibility) and Yanyan97 tobacco (YT, cold resistance). Methods: mRNA profiles of Tobacco seedlings from CK and cold-treated plants were generated by deep sequencing, in triplicate, usingIllumina Hiseq4500. The sequence reads that passed quality filters were analyzed at the transcript isoform level with methods: hisat2 (v2.0.5), SAMtools (v1.9). StringTie (v1.3.4d) and FeatureCounts (v1.6.4) Results: We found that both cultivars had common mechanisms to cope with cold stress, including common differentially expressed genes (DEGs), similar time-point-related differential expression profile of genes, and similar NtCBF gene co-expression modules, suggesting conservation of adaptation strategies for cold responses. Importantly, we found that YT experienced DEGs even under normal growth condition and had less DEGs in early stage of cold stress (0.5-2 h) when compared to TT, reflecting occurrence of genotype-dependent gene transcription. Moreover, a gene co-expression module (brown) with stress-related genes up-regulated in YT instead of TT at late stage (4-8 h), which might contribute to contrasting phenotypic changes during cold stress between TT and YT. Conclusions: our study provides valuable resources for transcriptomic studies of cold responses in plants. It also helps to identify key cold responsive genes for genetic manipulation for breeding of tobacco cultivars in the future.

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